I see a strange fail on a new Melzi board that we just connected to our Mendel. For all operations, the Melzi works ok, the prints are fine.
However, when I try to print with the SD card, I can't. The SD card init fails in the start-up, and the SD card fails to list all the files on the SD card.When I give the SD card init command, again I receive a SD card init fail message. Another strange thing that I notice is that when I send the SD card init command, my cooling fan noise increases for 2 seconds, and then goes back to normal - it almost seems that the 12V power line voltage gets a temporary spike.
What could be the reason and is there a simple solution?